kobejohn/PyMaze — pull request #1 by tijko (2014-01-09 08:49:39+00:00)
Title: reading through your code and found the "todo: there must be a better way" comment

Its not much but, you might prefer this way:

def __str__(self):
"""Return a rectangular string representation of this maze."""
# find the bounding rectangle
#rows = [r for r, c in self._spaces] # todo: there must be a better way
#cols = [c for r, c in self._spaces]
rows, cols = zip(*self._spaces) # use zip with '*' unpacking
row_min, row_max = min(rows), max(rows)
col_min, col_max = min(cols), max(cols)

# build the string

If that's what you were referring to here.